Rescue workers and vehicles respond to a tour bus crash in Pendleton, Ore., Sunday, Dec.30, 2012. Investigators in Oregon are trying to piece together the final moments before a Vancouver-bound tour bus carrying 48 people careened down a steep hillside, ejecting some of the passengers and killing nine.THE CANADIAN PRESS/HO-Oregon State Police

The company that owns the tour bus involved in Sunday's fatal bus crash in Oregon has posted a letter on the door of its Vancouver office, saying employees are grieving with the victims' families and assisting the survivors.

Mi Joo Tour & Travel has otherwise refused to comment on the accident as Oregon police slowly identify the dead publicly, including 11-year-old Youmin Kim, a South Korean girl who was staying with a BC family.

The girl and 75-year-old Yongho Lee, a resident of Lynwood, Wash., became the fourth and fifth victims named by police.

Nine people died and 38 were injured when the tour bus travelling westbound in the left lane of Interstate 84, hit a concrete barrier, veered across both westbound lanes and went through the guardrail, plunging about 60 metres down an embankment.

"On behalf of Mi Joo Tour, we share in the tremendous grief experienced by all of the survivors and families of the people involved in this terrible tragedy," stated the note posted on the company's door.

"We are focused on assisting and supporting the survivors and families. No further comment at this time."